After reading DELDE's thread, I thought about this.
Upvotes are used to count how many players agree with the OP, then why should downvotes decrease that number? I feel it's misleading.
I believe that downvotes should be hidden or replaced by the Report feature. They aren't there to express disagreement.
Too many times Suggestions and Help posts lose visibility because people randomly downvote them and they never get an answer.
Just go to Help & Support and Suggestions & Bug Reports and see that the majority of posts are downvoted for no reason at all.